Gas buhner



B. F. cRQw GAS v BURNER Aug.v 4, 1931.

Filed Aug. 13. 1928 Patented Aug. 4, 1931 BENJAMIN F. CROW, OF DALLAS, TEXAS GAS BURNER Application led August 13, 1928.

whirled and thus caused to more thoroughly mix with the gas in the tube. The gas may also be whirled by a spiral baille in the end of the gas supply pipe, the direction of the gas whirl being opposite to that of the air, whereby the airis more thoroughly saturated with the gas.

Still another object of the invention is to provide a sleeve surrounding the Venturi tube and an air admitting opening and an air discharge surounding the discharge end of said tube, whereby secondary air is sup-` plied to the llame of the burner.

A construction designed to carry out the invention will be hereinafter described, together with other features of the invention.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanT ing drawings'in which an example of the invention is shown, and wherein:

Fig. 1 is a longitudinal sectional view showing a burner constructed in accordance with the invention,

Fig. 2 is a front end elevation of the burner nozzle,

Fig. 3 is an enlarged transverse sectional view taken on the line 3 3 of Fig. 1.

Fig. l is a perspective view ofthe front portion of the nozzle, and

Fig. 5 is a detail of the gas supply pipe and its baille.

In the drawings the numeral designates a tubular air conductor which may be flared toward its discharge end and is connected at its opposite end with a blower fan 11 for supplying air to the conductor under a very light pressure. The conductor may be made integral with or otherwise attached to one end Serial No. 299,221.

of a sleeve 12 forming part of a burner nozzle and adapted to be inserted through the wall A of a furnace so as to project into the lire box (not shown). The sleeve 12 is shown as a continuation of the conductor 10, but it may be otherwise.

A Venturi tube 13 is inserted in the sleeve but is open only to the conductor 10. The end of the tube forms the division between the sleeve an d the conductor. The tube has a cylindrical extension 11i in which a spiral baille 15 is mounted and extends inwardly from the discharge end thereof. A gas supply pipe 1G extends axially of the conductor and has its discharge end terminating in the mouth of the tube 13. This pipe is connected with a feed pipe 17 extending through the wall of the conductor 1() and having a suitable source of supply.

In the entrance end of the tube 13 a spiral baille 18 is mounted so as to surround the end of the pipe 18. This baille, as is illustrated in Figs. 1 and 3, includes a plurality of radial blades 19 having laterally extending cupped wings 2O open to the air flowing from the conductor 10. T he air striking in the cupped wings and passing between the blades is deflected and caused to whirl as it flows through the tube 13. The wings are so set as to cause the air to whirl in a clockwise direction upon entering the tube.

In order to thoroughly mix the air and gas, a spiral baille 21 is inserted in the discharge end of the gas pipe 16, as is shown best in Fig. 5, and this baille is set to whirl the gas in a counter-clockwise direction as it is discharged into the Venturi tube and also into the whirling air. The opposite revolutions of the air and gas will promote a more thorough mixture.

The Venturi tube will increase the velocity of the gaseous mixture, which upon striking the baflle 15 will be whirled in a clockwise direction and thus discharged in a highly combustible state. A perforated ring 22 connects the tip ends of the sleeve 12 and the extension 14. Gutside of the wall A the sleeve is provided with air inlets 23 for admitting secondary air. The gaseous mixture discharged from the tube into the lire box creates suicient suction to draw in airthrough the openings 23 and this air being discharged through the ring 22 admiXes with the gaseous mixture and promotes combustion, as well as yadding to the etliciency of the burner. A

pilot pipe 24 extends along the sleeve 12 and terminates at the end of the burner.

A burner of this character is very economical and by thoroughly saturating the air with gas and by supplying sufficient oxygen a very intense flame is produced.- YThe gas and air being kept in motion from the point of their initial mixture make for better combustion and also a considerable saving in fuel is had because of the relatively large proportion of .air which is used.

and alterations, may be made within the scope Various changesin the size and shape of Q the different parts, as well as modifications of the appended claims.

What I claim, is Y l. In a gas burner, an air conductor for connection with an air blower, a Venturi 'tube connected with the conductor for receiving mechanically-propelled air therefrom, an air bafie at the entrance to the tube for whirling the air delivered to the tube, a gas supply pipe discharging gas into the tube beyond the air battle, a secondary air conveyor surrounding the tube and dischargingair around the tiprend of the tube, and a spiral baiile in.

therdischarge end of the tube for whirling the gaseous mixture.

2. In a gasburnenanair conductor for connection. with an air blow-er, a-Venturi tube connected withzthe conductor for receiving mechanically-propelled air therefrom, an air l baiile at the entrance to the tube for whirl-. .f ing the air delivered to the tube, a gas supply pipe extending` axially through the air baffle v for delivering gas into the whirling Aair', a, spiral baffle in the discharge end of the gas pipe set to whirl the gas counterto the whirl of the air, and a spiral baiiie in the discharge end of the tube for whirling the gaseous miX- ture Yjust prior to ignition. Y'

3. In a gas burner, a tubular air conductor for. connection with an air blower, a sleeve-- attached to the conductor, a Venturi tube within the sleeve open only to theconductor and receivingv all the air discharged there- 6. A gas Vburning device as set forth in claim t, with va spiral baffle in the discharge end of the gaspipe to whirl the gas counter to the whirl of the air..

7. A gas'burningdevice as set forth in claim 4;, with asecondary air conveyor surrounding the tube and discharging air around K4die tipV of said tube,

In testimony whereof'l'atiix my signature.

Y 'BENJAMIN r. fonow.

from, a gas pipe extending intothe tube, a

spiralbafe ymounted in the entrance end of the tube and surrounding the gas pipe, a spiral gas bafiiein the discharge end'of the gas pipe, a perforated ring connecting the outer endsv of the sleeve and the tube, saidfsleeve Y having air admitting openings remote from the ring, and a spiral baii'le in the outer end oft-he tube for whirling the gaseous mixture prior to its admixture with the secondary air from the ringl an dl sleeve. 4. In. a gas burning device, an air blower, a tubular air conductor extending fromthe exhaust of the blowerv andreceivingair solely 

